JPH10192130A - Electric curtain device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric curtain device of a simple structure using a hollow high lead screw in which curtain opening/closing action can be smoothly performed. SOLUTION: An electric curtain device is provided with a straight guide rail 11, plural rollers 12 engaged to be movable in the moving direction of the guide rail 11, a curtain 13 supported by the rollers 12, a hollow high lead screw 10 supported inside the guide rail 11, a nut 14 threaded with the screw 10, and a connection member 16 to connect the nut 14 to the roller 12 at the head. It also comprises a motor 17 provided with a torque limiter 17a to drive the screw 10 through a coupling 19, and a controller 18 to control rotation number of the motor, automatically stop the motor 17 at a moving limit by a limit switch 15, command starting an stopping of the motor 17 at a desired position, and command normal/reverse rotation of the motor for automatically opening/closing the curtain 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric curtain device for partitioning a hospital bed using a hollow small-diameter high-lead screw, an electric curtain device for a window of a wagon car, and the like.

[0002]

2. Description of the Related Art A conventional electric curtain device has a timing belt fixed to a movable body along a pair of parallel guide shafts as disclosed in, for example, Japanese Utility Model Application Laid-Open Nos. 60-10593 and 62-123185. The timing belt has been put to practical use in such a manner as to be stretched between an idle gear and a drive pinion, and the pinion opens and closes a curtain with a motor. Further, as disclosed in Japanese Patent Application Laid-Open No. 48-4061, a structure in which a curtain is opened and closed by a timing belt by a linear motor has been put to practical use.

[0003] Furthermore, in Japanese Utility Model Laid-Open No. 61-100282,
An electric curtain device using a screw member in which a belt-shaped material is twisted has been disclosed.

[0004]

According to the prior art, there are the following technical problems.

However, Japanese Utility Model Laid-Open No. 60-10593,
The electric curtain device shown in Japanese Utility Model Laid-Open Publication No.
When the timing belt is stretched over the idle gear and the drive pinion, the number of parts is large, and the cost is increased. Further, the reduction gear must be mounted orthogonally to the timing belt, which requires an extra space, and is not preferable in appearance.

JP-A-48-4061 using a linear motor
In this case, too, the cost of the linear motor is high, the number of parts of the device is large, and the cost is increased.

In Japanese Utility Model Application Laid-Open No. 61-100282, there is a problem that a uniform screw pitch is not assured in manufacturing, and the curtain cannot be rotated smoothly due to bending due to the weight of the curtain.

The electric curtain device of the present invention has been made in view of the conventional problems, and an object thereof is to provide a hollow high-lead screw that has a simple structure, has few failures, and can open and close the curtain smoothly. To provide an electric curtain device used

[0009]

Means for Solving the Problems To solve the above problems, the electric curtain device of the present invention has the following means.

The electric curtain device according to the present invention has a linear guide rail, a plurality of rollers movably engaged in the direction of movement of the guide rail, a curtain supported by the rollers, and a roller supported in the guide rail. A hollow high-lead screw, a nut screwed to the hollow high-lead screw, a connecting member for connecting the nut and the leading roller, a motor with a torque limiter for driving the hollow high-lead screw, and a control device for controlling the rotation speed of the motor And control the number of rotations of the motor,
Automatically stop the motor by the limit switch, or start the motor at any position, command stop,
It is characterized by comprising a controller for instructing forward and reverse rotation of the motor and automatically opening and closing the curtain.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The hollow high lead screw of the present invention is as follows.

The hollow high lead screw 10 of the present invention is shown in FIG.
As shown in FIGS. 2 and 3, a spiral screw groove 2 is formed in the hollow metal material 1, a wire 3 is wound along the screw groove 2, and the screw groove 2 and the wire 3 are joined. The thread groove 2 and the wire 3 are joined by brazing to manufacture the hollow high-lead screw 1. A Pn-Sn alloy was used for the brazing material. The joining of the thread groove 2 and the wire 3 may be performed by any known joining means other than brazing, such as welding by an electron beam or diffusion joining by heat treatment.

Even if the hollow metal material is not particularly provided with a thread groove, a wire material is wound at a correct pitch while rotating the hollow metal material 1 using a known coiling machine, and the hollow metal material 1 and the wire material 3 are described above. Joining using joining technology,
Can manufacture hollow high lead screw. Although a metal material is used as the material of the hollow high-lead screw 10, if the hollow high-lead screw 10 is made of a polymer material such as Delrin or Bakelite, the weight can be further reduced. Can also.

Further, if necessary, it is more effective to apply chrome plating to the hollow high lead screw to prevent abrasion. The nut that fits the screw may be made of a metal material such as copper or aluminum, or a polymer material such as delrin, nylon, or bakelite.

The hollow shaft used in this embodiment has a diameter of 6 mm, a length of 1000 mm, and a wall thickness of 0.5 mm.
Use copper pipe of 1mm diameter copper wire for the thread material, lead 20mm,
It was a double thread having a pitch of 10 mm, a thread diameter of 8 mm, and a root diameter of 6 mm.

[Embodiment] As shown in FIG. 1, the electric curtain device of this embodiment has a linear guide rail 11, a plurality of rollers 12 which are movably engaged in the moving direction of the guide rail 11, and Curtain 13 supported by
Hollow high lead screw 1 supported in guide rail 11
0 and a nut 14 screwed into the hollow high lead screw 10
, A connecting member 16 for connecting the nut 14 and the leading roller 12, and a motor 17 with a torque limiter 17 a for driving the hollow high-lead screw 10 via a coupling 19.
Control the number of rotations of the motor 17, automatically stop the motor by the limit switch 15 at the movement limit, or instruct the motor 17 to start and stop at an arbitrary position, and instruct the motor 17 to rotate forward and backward, And a controller 18 for automatically opening and closing the curtain 13.

The controller 18 is connected to the motor 1 via a cable.
7 is an on-off switch for instructing start and stop.
The controller 18 may be a remote switch for instructing the start and stop of the motor 17 via radio.

Next, the operation of the electric curtain device of this embodiment will be described.

When closing the curtain 13, the motor 17 is rotated by the controller 18. The rotation of the motor 17 causes the torque limiter 17a and the coupling 19 to rotate.
The hollow high-lead screw 10 is rotated through
4 moves the curtain 13 supported by the leading roller 12 connected via the connecting member 16.

When the movement limit is reached, the limit switch 15
Automatically stops the motor 17. Curtain 1
When opening the curtain 3, the controller 17 rotates the motor 17 in the reverse direction to open the curtain 13. On the way, when the curtain 13 is caught due to some trouble and the motor 17 is overloaded, the torque limiter 17a operates to protect the motor 17.

As described above, according to the electric curtain device of this embodiment, since the hollow high-lead screw is used, the structure can be made lighter and more compact than the conventional one.

Further, since a hollow high-lead screw having a small inertia force is used, an electric curtain device can be realized.

The electric curtain device of the present invention can be used for the following applications.

1 Electric curtain for partitioning between hospital beds 2 Electric curtain for wagon car window 3 Electric curtain for conference room 4 Electric curtain for general house 5 Electric curtain for theater stage

[0025]

According to the electric curtain device of the present invention, since a high-precision hollow high-lead screw is used, the structure can be made lighter and more compact than before.

According to the electric curtain device of the present invention, the helical thread groove of the hollow high-lead screw which cannot be processed conventionally uses a high-precision hollow high-lead screw of two or more threads. It is possible to achieve a compact structure that is lighter and has a smaller inertia force than the conventional one.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an electric curtain device according to the present embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow metal material 2 Screw groove 3 Wire rod 10 Hollow high lead screw 11 Guide rail 12 Roller 13 Curtain 14 Nut 15 Limit switch 16 Connecting member 17 Motor 18 Controller

Claims (3)

[Claims] An electric curtain device configured to automatically open and close a curtain, a linear guide rail, a plurality of rollers supported by the guide rail and movably engaged, and a curtain supported by the rollers A hollow high-lead screw supported in the guide rail, a nut screwed to the hollow high-lead screw, a connecting member connecting the nut and the leading roller, and locked to the plurality of rollers. A curtain, a motor with a torque limiter for driving a hollow high-lead screw, limit switches provided at the start and end points of the range of movement of the curtain of the guide rails, and control of the number of rotations of the motor. Or start or stop the motor at any position,
An electric curtain device comprising: a controller for instructing forward / reverse rotation of a motor and automatically opening / closing a curtain. 2. The electric curtain device according to claim 1, wherein the controller is an on-off switch for instructing start and stop of the motor via a wire. 3. The electric curtain device according to claim 1, wherein the controller is a remote switch for instructing start and stop of the motor via wireless communication.